During teething the mother must be especially watchful, for it is at this time that the disease so commonly appears; the irritation produced by this process being a frequent exciting cause. Every thing, therefore, that will tend to allay excitement of the system, must be strictly enforced, as well as all causes avoided, which would produce derangement of the stomach and bowels. The head should be kept cool. For this purpose it must be sponged night and morning throughout the whole period of teething; a horse-hair pillow used in the cot; and nothing but a light straw hat should be worn, except in winter, The diet should be moderate, and carefully regulated after leaving the breast, and the child should be as much as possible in the open air. The mouth must be occasionally examined, and if the gums become hot or distended, they must be scarified or lanced, as may be advised. If the parent finds at any time an unusual heat about the head, the medical man must be at once consulted; or if there is watchfulness or indisposition to sleep at the proper periods, or frequent startings in the sleep, irritability of temper, and much crying, danger should be apprehended, and prompt and judicious means employed. Eruptions about the head, or sores behind the ears, discharging more or less, will sometimes make their appearance just before the cutting of a tooth, and disappear after it is cut; or it will sometimes happen that, if not interfered with, they will continue throughout the whole period of dentition. Great caution should always be exercised in reference to these eruptions in all children; and when there is a predisposition to water in the head, it is dangerous to interfere with them at all, except they run to such an extent as to become very troublesome. The sudden healing of these cutaneous affections has again and again been followed by head-disease. They are unsightly in the eyes of a parent, but it must be recollected that they render the situation of such children much more safe; and when teething is completed they will generally disappear spontaneously; or, if they should not, they will readily do so by proper medical treatment. I have no doubt that many a child's life has been saved by the appearance and continuance of these eruptions; and so sensible are medical men of the benefit derived from them, that in individuals in whom they do not appear, and in whose family there exists a predisposition to the disease now under our consideration, an issue or seton, in the arm or neck, has sometimes been made, and had a remarkable influence in warding off this affection. Dr. Cheyne refers to the circumstance of ten children in one family having died of this disease; the eleventh, for whom this measure was employed, having been preserved.